I have created a standalone version of the exit-screen plugin. You can download it here: Exit Splash Screen JavaScript
Simply place the .js file on the root of your website and add the code below to invoke it somewhere near the bottom of your page.
<script src="/exit-screen.js" type="text/javascript"></script>
You will have to change the exit page url in the code, or else you will be sending people to buy my book.
The exit-screen-plugin automates this, but if you have pages outside of WordPress, then this JavaScript will do the trick.
I do not understand do we just copy the whole page and paste it in the footer of our webpage and then paste at the bottom of the code or could you just work us through it some of us are scared gutless when we see a page full of codes